Hey Vincenzo and thank you for the plugins!

I managed to run the Bittrex one successfully but with Kraken the authenticated part doesn't work for me. I get this every time:

Code:
2017-10-18 18:50:31,163 INFO [default] BrokerLogin IN
2017-10-18 18:50:31,163 INFO [default] GetAccBaseCurrExchRate IN Symbol: XBTUSD
2017-10-18 18:50:31,726 INFO [default] {"error":[],"result":{"XXBTZUSD":{"a":["5420.30000","2","2.000"],"b":["5417.10000","2","2.000"],"c":["5414.70000","0.21278133"],"v":["4623.17488130","5317.76831179"],"p":["5358.99670","5391.13164"],"t":[13710,16864],"l":["5132.30000","5132.30000"],"h":["5606.50000","5648.60000"],"o":"5606.50000"}}}
2017-10-18 18:50:31,726 INFO [default] GetAccBaseCurrExchRate OUT
2017-10-18 18:50:31,726 INFO [default] BrokerAccount IN
2017-10-18 18:50:31,726 INFO [default] {Content-Type: application/x-www-form-urlencoded
API-Key: ...
API-Sign: ...
}
2017-10-18 18:50:33,070 INFO [default] {"error":["EGeneral:Internal error"]}
2017-10-18 18:50:33,070 ERROR [default] EGeneral:Internal error
2017-10-18 18:50:33,070 ERROR [default] /0/private/TradeBalance
2017-10-18 18:50:33,070 ERROR [default] aclass=currency&asset=USD
2017-10-18 18:50:33,070 ERROR [default] /0/private/TradeBalance - Error Parsing JSon
2017-10-18 18:50:33,070 ERROR [default] Error calling API BrokerAccount
2017-10-18 18:50:33,085 INFO [default] BrokerAccount OUT
2017-10-18 18:50:33,085 ERROR [default] Can't Login - Retry
2017-10-18 18:50:33,101 INFO [default] BrokerLogin OUT
2017-10-18 18:50:33,101 INFO [default] BrokerLogin OUT


Any idea what could be the cause? I'm using Zorro S 1.66 and I followed the instructions from README on Github, DemoTrading is set to "0".